<!--

/*
** Copyright (c) 2015 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be included
** in all copies or substantial portions of the Materials.
**
** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/

-->

<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>GLSL: test that length() method called on a complex expression does not compile</title>
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<link rel="stylesheet" href="../../resources/glsl-feature-tests.css"/>
<script src="../../resources/js-test-pre.js"></script>
<script src="../../resources/webgl-test-utils.js"></script>
<script src="../../resources/glsl-conformance-test.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script id="fshaderLengthOfAssignment" type="x-shader/x-fragment">#version 300 es
precision mediump float;

out vec4 my_FragColor;

void main() {
    int a[3];
    int b[3];
    int c = (a = b).length();
    my_FragColor = vec4(float(c));
}
</script>
<script id="fshaderLengthOfFunctionCall" type="x-shader/x-fragment">#version 300 es
precision mediump float;

out vec4 my_FragColor;

int[2] func() {
    int a[2];
    return a;
}

void main() {
    int b = (func()).length();
    my_FragColor = vec4(float(b));
}
</script>
<script id="fshaderLengthOfConstructor" type="x-shader/x-fragment">#version 300 es
precision mediump float;

out vec4 my_FragColor;

void main() {
    int a = (int[1](0)).length();
    my_FragColor = vec4(float(a));
}
</script>
<script type="text/javascript">
"use strict";
description();
debug("These restrictions come from ESSL 3.00 section 5.9 definition of expression, which only allows length to be called on array names, not on arbitrary expressions returning an array.");
GLSLConformanceTester.runTests([
  {
    fShaderId: "fshaderLengthOfAssignment",
    fShaderSuccess: false,
    linkSuccess: false,
    passMsg: "Fragment shader which tries to evaluate the length of an assignment operation should fail."
  },
  {
    fShaderId: "fshaderLengthOfFunctionCall",
    fShaderSuccess: false,
    linkSuccess: false,
    passMsg: "Fragment shader which tries to evaluate the length of a return value should fail."
  },
  {
    fShaderId: "fshaderLengthOfConstructor",
    fShaderSuccess: false,
    linkSuccess: false,
    passMsg: "Fragment shader which tries to evaluate the length of a newly constructed array should fail."
  }
], 2);
</script>
</body>
</html>

